feat(D1): 改稿进飞轮 - 最强真实信号 text_edit +5

倩倩姐2026-06-16拍板:改稿=用户真改了字=最在乎这条方向=最强真实信号。
先激进入飞轮跑一周,北哥用后按真实数据校准是否加"过审才入"闸门。

改动:
- enums.py: SignalType.TEXT_EDIT + SIGNAL_WEIGHTS权重5(≥选择类)
- task.py: TextCandidate.edited 布尔字段
- 013迁移: text_candidates加edited列 + preference_events.signal_type
  ENUM补text_edit(端到端实测抓出:不补会Data truncated)
- task_actions.py: POST /{task_id}/text-candidates/{cid}/edit 端点
  回写content+edited=True+record_signal写text_edit,走task_actions不碰review.py

端到端实测:edited False→True,飞轮信号真落库type=text_edit weight=5。
顺手: tsconfig.tsbuildinfo 移出版本控制(构建产物)。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/app/api/v1/task_actions.py

@@ -8,6 +8,7 @@ import logging
 from typing import Annotated
 
 from fastapi import APIRouter, Depends
+from pydantic import BaseModel, Field
 from sqlalchemy.orm import Session
 
 from app.core.database import get_db
@@ -144,3 +145,37 @@ def get_preference_context(
     from app.services.flywheel_service import get_preference_context
     ctx = get_preference_context(db, current_user.workspace_id, task.product_id)
     return ok(ctx)
+
+
+class EditTextRequest(BaseModel):
+    """改稿请求：candidate_id + 用户改后的新文案。"""
+    candidate_id: int
+    content: str = Field(min_length=1, max_length=5000)
+
+
+@router.post("/{task_id}/text-candidates/{candidate_id}/edit")
+def edit_text(
+    task_id: int, candidate_id: int, body: EditTextRequest,
+    current_user: Annotated[CurrentUser, Depends(require_write_permission)] = None,
+    db: Session = Depends(get_db),
+):
+    """改稿（飞轮信号 text_edit +5，最强真实信号）。
+
+    用户真改了文案的字=最在乎这条方向。回写 content + edited=True，
+    并写 text_edit 飞轮偏好事件。倩倩姐2026-06-16拍板，先激进入飞轮跑一周再校准。
+    """
+    from app.services.flywheel_service import record_signal
+    task = _check_task_ownership(
+        db.query(GenerationTask).filter(GenerationTask.id == task_id).first(),
+        current_user.workspace_id,
+    )
+    tc = db.query(TextCandidate).filter(
+        TextCandidate.id == candidate_id, TextCandidate.task_id == task_id
+    ).first()
+    if not tc:
+        raise_not_found("文案候选不存在")
+    tc.content = body.content
+    tc.edited = True
+    db.commit()
+    record_signal(db, current_user, task, "text_edit", candidate_id=tc.id, angle_label=tc.angle_label)
+    return ok({"candidate_id": candidate_id, "edited": True})